Originally Posted by martyYYZ
I don't think that you'll be able to upgrade on the ORD-DFW flights as they are not on AC metal.
1) 7 days if SE, 4 days if E
2) YUL-ORD shows J5C3, ORD-YUL shows J9C9
3) only YUL-ORD and ORD-YUL can be upgraded assuming your ticket is booked in an eligible fare class
4) yes, you will have to call back to upgrade the return
This would be a huge waste of a SSWU. Could be used for LHR-YVR-SYD (for example). Or 300 bucks on ebay.